[AUTO] Add release notes for 2.19.6

[opensearch-ci-bot]

Add release notes for 2.19.6

Borderline Calls

• update kafka to 3.9.2 #6089: Placed in Maintenance — could also be Bug Fixes since it resolves CVEs, but dependency version updates are more consistent with Maintenance categorization.

[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit 95d3c10)

Here are some key observations to aid the review process:

🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

Persistent review updated to latest commit 647b599

[github-actions]

PR Code Suggestions ✨

Latest suggestions up to 95d3c10
Explore these optional code suggestions:

Category	Suggestion	Impact
General	Fix likely incorrect CVE year in note The CVE identifier CVE-2026-35554 appears to reference a future year (2026), which is likely a typo. Verify the correct CVE number (e.g., CVE-2025-XXXXX) and update the release note to avoid publishing incorrect security references. release-notes/opensearch-security.release-notes-2.19.6.0.md [7] -* Update Kafka to 3.9.2 to resolve CVE-2026-35554 and other security issues ([#6089](https://github.com/opensearch-project/security/pull/6089)) +* Update Kafka to 3.9.2 to resolve CVE-2025-35554 and other security issues ([#6089](https://github.com/opensearch-project/security/pull/6089)) Suggestion importance[1-10]: 7 __ Why: The CVE identifier CVE-2026-35554 references year 2026, which is suspicious and likely a typo. However, the suggested replacement CVE-2025-35554 is a guess, so the user should verify the actual correct CVE number.	Medium

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Previous suggestions

Suggestions up to commit 647b599

Category	Suggestion	Impact
General	Verify CVE identifier year is correct The CVE identifier CVE-2026-35554 appears to use a future year (2026) which is unusual and likely a typo. Verify the correct CVE identifier (e.g., CVE-2025-...) before publishing the release notes, as incorrect CVE references can mislead users about the security context. release-notes/opensearch-security.release-notes-2.19.6.0.md [7] -* Update Kafka to 3.9.2 to resolve CVE-2026-35554 and other security issues ([#6089](https://github.com/opensearch-project/security/pull/6089)) +* Update Kafka to 3.9.2 to resolve CVE-2025-35554 and other security issues ([#6089](https://github.com/opensearch-project/security/pull/6089)) Suggestion importance[1-10]: 8 __ Why: The CVE identifier CVE-2026-35554 uses a future year (2026), which is highly likely a typo for CVE-2025-35554. Incorrect CVE references in release notes can mislead users about security implications, so this is an important catch.	Medium

[github-actions]

Persistent review updated to latest commit 95d3c10